| author | Christian Urban <christian.urban@kcl.ac.uk> |
| Sun, 19 Oct 2025 09:44:04 +0200 | |
| changeset 1011 | 31e011ce66e3 |
| parent 254 | dcd4688690ce |
| permissions | -rw-r--r-- |
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254
dcd4688690ce
updated
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
97
diff
changeset
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val http_pattern = """"https?://[^"]*"""".r |
| 7 | 2 |
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def unquote(s: String) = s.drop(1).dropRight(1) |
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254
dcd4688690ce
updated
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
97
diff
changeset
|
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def get_all_URLs(page: String) : Set[String] = |
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9fcd3de53c06
updated
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
93
diff
changeset
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http_pattern.findAllIn(page).map(unquote).toSet |
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def crawl(url: String, n: Int) : Unit = {
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if (n == 0) () |
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else {
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96
9fcd3de53c06
updated
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
93
diff
changeset
|
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println(s"Visiting: $n $url") |
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254
dcd4688690ce
updated
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
97
diff
changeset
|
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for (u <- get_all_URLs(get_page(url))) crawl(u, n - 1) |
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} |
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} |
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254
dcd4688690ce
updated
Christian Urban <christian dot urban at kcl dot ac dot uk>
parents:
97
diff
changeset
|
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crawl(some_start_URL, 2) |